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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2019
Equity [Abstract] |
Schedule of common share repurchases | The following table summarizes our common share repurchases and issuances.
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(Shares and per share amounts in actuals) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Common stock repurchased under repurchase program(1) |  | 5,989,279 |  |  | — |  |  | 11,424,755 |  |  | — |
Average purchase price per share(2) |  | $ | 10.04 |  |  | $ | — |  |  | $ | 10.51 |  |  | $ | — |
Shares repurchased related to employee stock-based compensation plans(3) |  | 24,036 |  |  | 200,577 |  |  | 1,313,427 |  |  | 2,940,595 |
Average purchase price per share |  | $ | 10.05 |  |  | $ | 11.60 |  |  | $ | 10.93 |  |  | $ | 11.33 |
Common shares issued(4) |  | 181,020 |  |  | 384,955 |  |  | 3,651,684 |  |  | 5,944,946 |
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(1) | Common shares purchased under our share repurchase program. $80 million of capacity under the program remained available as of June 30, 2019.
(2) | Average purchase price per share includes purchase commission costs.
(3) | Comprised of shares withheld from stock option exercises and vesting of restricted stock for employees’ tax withholding obligations and shares tendered by employees to satisfy option exercise costs.
(4) Common shares issued under our various compensation and benefit plans.

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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